2001 ASD Supplements - unprotected PDF - American Wood Council

ASD STRUCTURAL LUMBER SUPPLEMENTPrefaceThis Supplement contains adjustment factors, dimensions,member design capacities and other propertiesrequired to design structural lumber in the ASD format.The member design capacity values tabulated in thisSupplement are to be used in conjunction with the designmethodologies provided in ANSI/AF&PA NDS-2001,National Design Specification ® (NDS ® ) for Wood Construction.The tabulated design values are provided in the NDS-2001 Supplement: Design Values for Wood Constructionand were derived according to ASTM Standards D1990,D245, and D2555.The reference member design capacity values are tobe used within the reference end-use conditions definedherein. When the end-use conditions fall outside the rangeof the reference conditions, the capacity values shall bedetermined by calculations according to the NDS. For unusualend-use conditions, the designer should consultadditional literature for possible further adjustments.The development and future maintenance of thisSupplement is a cooperative effort between AF&PA andthe lumber industry. The lumber organizations involvedin the development and review are as follows:Canadian Wood Council (CWC)Southern Forest Products Association (SFPA)Southern Pine Inspection Bureau (SPIB)West Coast Lumber Inspection Bureau (WCLIB)Western Wood Products Association (WWPA)Every effort has been made to ensure the accuracy ofthe information presented. Member selection tables areprovided for materials widely used in wood construction.The purpose of this Supplement is to provide convenientreference and design aids to design professionals.Suggestions for improvement of this Supplement arewelcomed and will be considered for future editions. Allsuggestions and comments should be directed to AF&PAor one of the organizations listed above.AMERICAN WOOD COUNCIL